The ABB S203P-Z16 is a 3-pole miniature circuit breaker with a Z-characteristic curve rated at 16 A. The Z-curve trips between 2.5× and 4× In, designed for protection of sensitive electronic loads — semiconductor circuits, PLC power supplies, instrumentation loops — where standard B- or C-curves would nuisance-trip on inrush. The 480Y/277 VAC rating covers 3-phase wye systems common in North American commercial and industrial panels.
ABB S203P-Z16 MCB 3P Z 16A, Molded Case Circuit Breaker
MPNS203P-Z16
ABB S203P-Z16, MCB 3P Z 16A 480Y/277 SUPP, Molded Case Circuit Breaker, 0.45 kgs.
$40.64Ref. price · indicative, final on quote
StockContact for availability
Lead timeCall for availability wk
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jul 2026
Specifications
Specifications
| Parameter | Value |
|---|---|
| Weight | 0.45 kgs |
Product details
Frequently asked questions
Where can I buy S203P-Z16 and how is it quoted?
The S203P-Z16 is sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at the time of quote.
What is the Z-curve used for on this MCB?
The Z-characteristic curve (2.5× to 4× In) is designed for protection of sensitive electronic loads — PLCs, instrumentation, semiconductor circuits — where standard B- or C-curves would cause nuisance tripping on inrush.
MPN
S203P-Z16